Clara chose this excerpt to help support her interpretation of “The Caged Bird” because it has an extended metaphor that examines

suffering

Explanation:

Here's the complete question:

I sit and look out upon all the sorrows of the world, and upon all oppression and shame; I hear the secret convulsive sobs . . .

Clara chose this excerpt to help support her interpretation of "The Caged Bird" because it has an extended metaphor that examines

An extended metaphor refers to the version of metaphor which extends over several stanzas, lines, or paragraphs.

With regards to the question, the extended metaphor examines suffering. This can be deduced from the poem where it was written that "I sit and look out upon all the sorrows of the world... "

what is the purpose of the description in this passage from travels with charley?

to explain how he develops friendships with people

to show his fear of the man

to show that people in the bad lands are dangerous

to show the similarity between the man and the place